CN215019356U

CN215019356U - Shell-shaped dental instrument and shell-shaped dental appliance set

Info

Publication number: CN215019356U
Application number: CN202120929568.7U
Authority: CN
Inventors: 庄慧敏; 王星星; 吴刚; 姚峻峰
Original assignee: Shanghai Zhengya Dental Technology Co Ltd
Current assignee: Shanghai Zhengya Dental Technology Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-07
Anticipated expiration: 2031-04-30
Also published as: TWM630174U

Abstract

The utility model discloses a shellliform dental appliance and include at least one shellliform dental appliance's shellliform dental appliance suit. The shell-shaped dental appliance comprises a shell-shaped body provided with a plurality of tooth receiving cavities, the shell-shaped body is provided with a screen, the screen comprises a blocking part which is arranged on the side surface of a lip and/or a cheek and protrudes towards the direction of a far tooth, and a contact part which is connected with the blocking part and is arranged, when the shell-shaped dental appliance is worn, the blocking part is in contact with a labial muscle and/or a cheek muscle, and the force applied by the labial muscle and/or the cheek muscle to the blocking part is at least partially transmitted to the corresponding gum through the contact part. The utility model discloses a shellliform dental appliance keeps off through setting up the screen, has avoided correcting the problem that in-process lip muscle and/or buccinator restrain the tooth growth, passes through the contact site with the pressure that partial lip muscle and/or buccinator were applyed and transmits corresponding gum department, has increased shellliform dental appliance has improved the maintenance power of correcting the effect and shortened and has rescued the cycle to the gum.

Description

Shell-shaped dental instrument and shell-shaped dental appliance set

Technical Field

The utility model belongs to the technical field of the tooth is rescued, more precisely relate to the stealthy technical field of rescuring in no support groove, especially indicate a shelly dental appliance and shelly dental appliance suit.

Background

Compared with the traditional orthodontic diagnosis and treatment technology, the bracket-free invisible correction technology is selected by more and more people due to the advantages of comfortable wearing and attractive appearance. However, the existing invisible orthodontic treatment has certain limitations aiming at the early orthodontic treatment of the deciduous dentition, the mixed dentition and the constant dentition, mainly the patients are low in age, and except the problem of aligning teeth, most of the patients still have the growth of the length, the width and the height of the upper jaw and the lower jaw; differential growth of the lower jaw; determining temporomandibular joint position related to craniofacial neuromuscular function and occlusal relationship; the development of the face soft tissue is completed and the coordination and stable functional relationship with the jaw bone is formed. Functional correction is required in addition to tooth alignment during treatment.

Traditional functional correction ware needs the manual steel wire of bending to make the support, uses the plastic coating of congealing certainly, then polishes according to patient's oral cavity structure, and whole process is wasted time and energy and the cost of manufacture is higher. When the functional orthopedic appliance is worn at the beginning, the size of the patient is large, the pronunciation and the chewing are affected after the patient wears the functional orthopedic appliance, and the swallowing function can be adapted in a long time. Meanwhile, the functional appliance can also influence the saliva secretion and saliva flow of the oral cavity of a patient in the wearing process, thereby influencing the self-cleaning and remineralization functions of the tooth body, changing the oral cavity micro-ecology of the patient and influencing the oral health.

At present, clinically, aiming at the problem that developing dentition is easily affected by abnormal perioral muscle function, a patient needs to be matched with functional appliances such as a buccal screen, a lip block and the like to adjust the perioral muscle function besides wearing a bracket-free invisible appliance. Among the prior art, the patient generally need wear the stealthy ware of correcting of no support groove daytime and carry out the tooth alignment, wears the functional ware of correcting at night and promotes the rebuilding of alveolar bone and the rebuilding of maxillofacial structure. However, in general, a patient with aligned teeth needs to wear the bracket-free invisible orthodontic appliance for at least 20 hours each day to achieve a treatment effect, and a functional orthodontic appliance is worn for at least 10 hours each day to achieve a treatment effect, so that the prior art cannot synchronously perform tooth alignment and muscle function orthodontic, which inevitably results in a longer treatment period and an increased treatment frequency, and thus the treatment cost of the patient is increased.

To this end, the present application provides a solution to the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem overcome the defect that prior art exists, provide a novel shellliform dental instrument and shellliform dental appliance suit that has the flesh function and rescues.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a shell-shaped dental device comprises a shell-shaped body provided with a plurality of tooth accommodating cavities, wherein the shell-shaped body is provided with a screen, the screen comprises a blocking part which is arranged on the side surface of a lip and/or a cheek and protrudes towards the direction of a far tooth, and a contact part which is connected with the blocking part and is arranged, when the shell-shaped dental device is worn, the blocking part is in contact with a labial muscle and/or a cheek muscle, and the force applied by the labial muscle and/or the cheek muscle to the blocking part is at least partially transmitted to a corresponding gum through the contact part. The contact part transmits part of force applied by the labial muscle and/or the cheek muscle to the corresponding gum, so that the retention force of the shell-shaped dental appliance to the gum is increased, and the problem that the shell-shaped dental appliance is easy to fall off from teeth due to small dentition of a patient is solved.

Preferably, the tooth receiving cavity has a geometry that causes at least a partially received tooth to move from a first position to a second position.

Preferably, the contact portion has a structure that stably contacts with the corresponding gum when worn.

Preferably, the shape of the tooth-near surface of the contact part is basically matched with the shape of the corresponding gum, so that the contact part is more fit with the corresponding gum.

Preferably, the blocking portion is formed by a labial side and/or a buccal side of at least one of the tooth receiving cavities protruding in a distal direction.

Preferably, the inner surface of the barrier is at least partially free from contact with the outer side of the teeth adjacent to the inner surface of the barrier when worn.

Preferably, the blocking portion is provided to protrude toward the gum on the labial side and/or the buccal side of the shell-like body in the distal direction.

Preferably, the blocking portion and the contact portion are of an integral structure or a separate structure.

Preferably, when the blocking portion and the contact portion are integrally formed, the blocking portion has a cavity structure protruding in a distal direction.

Preferably, the cross-sectional shape of the blocking portion in the long axis direction of the tooth is one of an ellipse, a drop, a polygon, or a combination thereof.

Preferably, the barrier is filled with a filler for enhancing the strength of the barrier.

Preferably, when the stopper and the contact portion are formed as separate bodies, the stopper may be fixed to the shell-shaped body by any one of bonding, caulking, and welding.

Preferably, when the stopper and the contact part are separate bodies, the material of the stopper and the material of the contact part may be identical or different.

Preferably, when the material of the barrier portion is the same as that of the contact portion, the material thickness of the barrier portion is larger than that of the contact portion.

Preferably, when the barrier section is not identical to the contact section material, the elastic modulus of the barrier section material is larger than the elastic modulus of the contact section material.

Preferably, the blocking portion is a solid protrusion.

Preferably, the maximum height of the stopper portion protruding in the distal direction is 3mm to 8 mm.

Preferably, the length of the blocking portion in the direction of the dental arch is 1-6 teeth wide.

Preferably, the length of the blocking portion in the direction of the dental arch is the width of the entire dental arch.

Preferably, any one or more of the proximal, distal, mesial, and distal surfaces of the barrier is provided with at least one stiffening member.

Preferably, the reinforcing member is integrally formed with the barrier portion, and the reinforcing member has a cavity structure having a surface curvature exceeding that of the barrier portion.

Preferably, the reinforcing member and the stopper are separate bodies, and the reinforcing member is fixedly attached to the stopper.

Preferably, the reinforcement member is disposed on the barrier in a gingival-jaw direction or a mesial-distal direction.

Preferably, the shell-shaped body is further provided with an arch expanding device matched with the blocking part for use.

Preferably, the arch expansion device and the shell-shaped body are of an integral structure, and two ends of the arch expansion device are connected with the gingival margin of the lingual side of the left and right rear tooth areas of the shell-shaped body or the gingival margin adjacent to the lingual side of the left and right rear tooth areas.

Preferably, the arch expanding device and the shell-shaped body are of a separate structure, and the arch expanding device is detachably mounted on the shell-shaped body.

The utility model provides a ware suit is rescued to shelly dentistry, includes first shelly body and second shelly body, first shelly body is as above-mentioned arbitrary shelly dental instrument, the second shelly body is equipped with a plurality of teeth and accomodates the chamber, first shelly body with the cooperation of second shelly body is used.

Preferably, the second shell-like body is a shell-like dental instrument as described above.

Preferably, when the positions of the screen on the first shell-shaped body and the screen on the second shell-shaped body are consistent on the long axis of the tooth, the lengths of the blocking part on the first shell-shaped body and the blocking part on the second shell-shaped body in the direction of the long axis of the tooth do not exceed the jaw plane.

Through the utility model provides a ware suit is rescued to shelly dental instrument and shelly dentistry can bring following at least one beneficial effect:

1. the screen on the shell-shaped dental appliance of the utility model is provided with a blocking part and a contact part, wherein, the blocking part blocks the contact of the lip and the buccinator and the corresponding dentition, thereby reducing the inhibiting effect of the buccinator on the growth of the side of the tooth and the inhibiting effect of the buccinator on the growth of the front of the tooth, and stimulating the horizontal or longitudinal development of the tooth; the force applied by the labial muscle and/or the cheek muscle to the blocking part is at least partially transmitted to the corresponding gingiva through the contact part, so that the retention force of the shell-shaped dental appliance to the gingiva is enhanced, and the problem that the shell-shaped dental appliance is easy to fall off from the teeth when the teeth of a patient are small is solved.

2. Compare with traditional functional correction ware, the utility model discloses shelly dental appliance sets up the screen on the basis that ware was rescued to current shelly tooth and keeps off to fuse the two organically, thereby make shelly dental appliance when the alignment tooth row, have the function of adjusting oral cavity vestibule district and mouth week tissue, improved patient's the comfort level of rescuing and shortened and rescued the cycle.

3. The utility model discloses still be equipped with on the shelly dental appliance and keep off the arch device that expands that the cooperation was used with the screen, the deformation that expands the arch device induces upper jaw palatal centre joint bone deposit buccal side and expands, and back tooth district tooth is to buccal lateral shifting under the effect that expands the arch device, and, the screen of shelly dental appliance buccal side keeps off and utilizes its cheek to the removal for tooth to provide abundant space to far away tooth direction convex structure, and buccinator is to the resistance of dental arch when having avoided expanding the arch.

4. The utility model discloses a shell form dental appliance suit wears shell form dental appliance simultaneously to upper and lower jaw, and wherein at least one shell form dental appliance is equipped with the screen and keeps off for upper and lower jaw tooth row can normal growth in length, width, high three direction furthest in the alignment. The tooth correction steps are reduced, and the correction period is shortened.

Drawings

The foregoing features, technical features, advantages and embodiments are further described in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic view of one embodiment of a shell-like dental implement of the present invention;

FIG. 2 is a schematic top view of the shell-like dental instrument of FIG. 1;

FIG. 3 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 4 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 5 is a schematic cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 7 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 8 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 9 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 10 is a schematic view of another embodiment of a shell-like dental implement of the present invention;

FIG. 11 is an enlarged view of area I of FIG. 10;

fig. 12 is a schematic view of another embodiment of a shell-shaped dental implement according to the present invention.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

Referring to fig. 1 and 2, the present invention includes a shell-shaped dental device, wherein the shell-shaped dental device includes a shell-shaped body 100 having a plurality of tooth receiving cavities, and the tooth receiving cavities wrap the entire tooth 200 from the crown to the gingival margin. The shell-shaped body 100 is further provided with a shield 101, and the shield 101 comprises a contact part 103 and a blocking part 102 which are integrally formed with the shell-shaped body 100. The blocking portion 102 protrudes from the labial surface, the buccal surface, or the labial-buccal surface of the shell-shaped body 100 toward the distal direction, and supports the labial-buccal mucosa to block the contact of the labial muscle, the buccal muscle, or the labial-buccal muscle with the corresponding tooth, thereby reducing the inhibitory effect of the labial muscle, the buccal muscle, or the labial-buccal muscle on the growth of the tooth, and stimulating the lateral or longitudinal development of the corresponding tooth. The contact part 103 is connected with the blocking part 102, when the device is worn, the contact part 103 contacts with the corresponding gum 300 provided with the screen 101, and the contact part 103 has a structure stably contacting with the corresponding gum 300, specifically, the near-gum surface of the contact part 103 may be a curved surface structure, a plane structure or a structure with convex points. Preferably, a curved structure substantially matching with the shape of the corresponding gum 300 is adopted, such a structure can make the contact portion 103 completely fit and cover the corresponding gum 300, thereby enhancing the control force of the shell-shaped dental appliance on the corresponding gum 300 and solving the problem that the shell-shaped dental appliance is easy to fall off from the teeth due to the smaller teeth of the patient, such as the deciduous teeth of children or early mixed dentition of teenagers. Specifically, when the patient wears the shell-shaped dental appliance, the blocking portion 102 blocks the force applied by the labial muscle, the buccal muscle or the labrocoudes to the teeth to inhibit the growth and development of the teeth, and the blocking portion 102 is connected to the contact portion 103 and transmits the pressure of part of the labial muscle, the buccal muscle or the labrocoudes to the corresponding gingiva 300 in contact with the contact portion 103, so that the control force of the shell-shaped dental appliance to the corresponding gingiva 300 during the wearing process is enhanced, and the shell-shaped dental appliance is not easy to fall off the teeth. It should be noted that the tooth receiving cavity may have a function of aligning teeth, and specifically, the tooth receiving cavity has a geometry that allows at least a portion of the received teeth to move from a first position to a second position, where the first position may be an initial position of the teeth in any of the correction steps, and the corresponding second position is a target position of the teeth in the step; of course, the teeth receiving cavity may not have the function of aligning the teeth.

In some embodiments, referring to fig. 3-5, the blocking portion 102 is formed by a labial and/or buccal side surface of at least one of the tooth receiving cavities protruding in the distal direction. It is preferable that the labial or buccal side of the tooth-receiving cavity is protruded in the distal direction to form a stopper 102, and the stopper 102 is integrally formed with the shell-shaped body 100, that is, the shield is integrally formed with the shell-shaped body. When the blocking portion 102 protrudes from one or more tooth receiving cavities in the distal direction, the blocking portion 102 may be formed to protrude in the distal direction on any one side of both buccal sides or both sides thereof according to different treatment schemes. Referring to the shell-shaped dental device in fig. 3, the blocking portion 102 is formed by one or more tooth receiving cavities protruding in the distal direction (the dotted line portion is the shape when the tooth receiving cavity does not protrude in the distal direction), and when the blocking portion 102 is worn by a patient, the inner surface of the blocking portion 102 does not contact the outer side surface of the tooth adjacent to the inner surface of the blocking portion 102, so that the blocking portion 102 is prevented from exerting an undesired force on the tooth. The barrier provided in the middle of the plurality of barriers 102 can increase the strength of the buccal surface of the barrier 102, and the barrier 102 is not easily deformed when worn. Referring to the shell-shaped dental device in fig. 4, the blocking portion 102 is formed by one or more tooth receiving cavities protruding in the distal direction, and likewise, after the device is worn by the patient, the inner surface of the blocking portion 102 is not in contact with the outer side surface of the tooth adjacent to the inner surface of the blocking portion 102, so that the force applied to the tooth by the blocking portion 102 is eliminated to the greatest extent possible.

Referring to fig. 5, the shell-shaped body 100 and the shield 101 are integrally formed, and the surface of the blocking portion 102 adjacent to the buccinator muscle can be a smooth curved surface, so that the patient does not have a strong foreign body sensation after wearing the mask, and the comfort of the patient is improved. In this embodiment, the control capability of the tooth receiving cavity with the blocking portion 102 on the corresponding tooth is not strong, and the tooth receiving cavity in this region has insufficient correction force on the tooth, but in the production process, especially when the shell-shaped dental appliance 100 is produced and manufactured by using the hot-pressing film technology, the processing difficulty is small, and the mold release is easier. Referring to the shell-shaped dental device in fig. 6, in order to enhance the control capability of the tooth receiving cavity or the shell-shaped dental device in the embodiment of fig. 5 on the corresponding tooth, the blocking portion 102 may contact with a crown region a (a region pointed by an arrow in fig. 6) of the tooth adjacent to the blocking portion 102, so that the area of the tooth receiving cavity wrapped by the crown of the corresponding tooth is increased, thereby increasing the control capability of the tooth receiving cavity or the shell-shaped dental device on the corresponding tooth while maintaining the blocking of the cheek muscle by the blocking portion 102.

In other embodiments, referring to fig. 7, the blocking portion 102 protrudes to the far teeth direction and is disposed at the gingiva on the labial side and/or the buccal side of the shell-shaped body 100, and covers a part of the tooth receiving cavity adjacent to the surface of the labial muscle and/or the buccal muscle and a part of the gingival surface. Compare with the protruding structure that forms of chamber is accomodate by the tooth to the distant tooth direction to the stop 102, the characteristics of this structure lie in that the tooth that the stop 102 corresponds accomodates the chamber and is bigger to the parcel area of tooth, and shelly dental appliance is stronger to the whole control power of dentition, the setting of stop 102 does not influence the dynamics of correcting of shelly dental appliance corresponding tooth. The blocking portion 102 and the contact portion 103 may be an integral structure or a separate structure. When the blocking portion 102 and the contact portion 103 are formed as an integral structure, that is, the shield and the shell-shaped body 100 are formed as an integral structure. The blocking portion 102 is a cavity structure protruding in the direction of the distal tooth. The section shape of the vacuole in the long axis direction of the tooth is one of an ellipse, a drop shape and a polygon or one of the combination of the shapes. Preferably oval, drop-shaped, or a combination of both, with a smooth curved configuration that allows the barrier 102 to more closely conform to the patient's labial and/or buccal muscles, reducing the patient's discomfort. While also distributing some of the pressure exerted by the labial and/or buccal muscles so that the pressure exerted by the labial and/or buccal muscles on the barrier 102 is not transmitted to the corresponding teeth too much.

The blocking portion 102 may be internally provided with a filler for enhancing the strength and/or rigidity of the blocking portion 102, so as to prevent the blocking portion 102 from being deformed due to excessive pressure applied to the blocking portion 102 by the labial muscle and/or the buccal muscle, so that the blocking portion 102 loses the function of isolating the labial muscle and/or the buccal muscle from the corresponding teeth, the filler further ensures the strength of the blocking portion 102, so that the corresponding teeth have sufficient space for lateral or longitudinal growth, and the filler may be a glass resin material meeting the oral medical standard.

In other embodiments, when the blocking portion 102 and the contact portion 103 are separate structures, the contact portion 103 and the shell-shaped body 100 are integrally formed. The blocking portion 102 may be fixed to the shell-shaped body 100 by any one of bonding, riveting and welding, and it is preferable that the blocking portion 102 is fixed to the shell-shaped body 100 by using an adhesive, so that the process is simpler during manufacturing and is beneficial to mass production. When the material of the barrier portion 102 is consistent with that of the contact portion 103, the barrier portion 102 may increase rigidity by increasing thickness. When the material of the barrier portion 102 is not consistent with that of the contact portion 103, the barrier portion 102 may be made of a material having a modulus of elasticity greater than that of the contact portion 103 to increase the rigidity, such as a metal, ceramic or other polymer material.

In other embodiments, referring to fig. 8, the lip-side barrier 101 has a maximum height L1 of the blocking portion protruding in the distal direction of the teeth in a range of 3mm to 8 mm. The barrier may be set to have a thickness of 2.5mm to 3.0mm itself, and the gap between the inner surface of the barrier adjacent to the outer surface of the tooth and the outer surface of the corresponding tooth is set to be at least 3.0mm for the purpose of reducing the inhibitory effect of labial and/or buccal muscles on the growth of the tooth. The length of the shield 101 in the direction of the dental arch is 1-6 teeth or the width of the entire dental arch, and the shield 101 may be provided on the labial, buccal, or labio-buccal side (see fig. 9), wherein the shield may be provided on both sides or one side when provided on the buccal side. The screen 101 arranged on the lip side can eliminate the pressure of partial lips on the jaw bone, and meanwhile, partial alveolar periosteum is pulled to stimulate the alveolar labial surface bone deposition. Secondly, the screens 101 are arranged on the labial side and the buccal side simultaneously, so that periosteum at the vestibular groove can be pulled, and the growth and development of corresponding alveolar bones are stimulated.

In other embodiments, any one or more of the proximal, distal, proximal, and distal surfaces of the barrier 102 may be provided with at least one stiffening member 104 to stiffen the barrier 102. Preferably on any surface other than the distal dental surface, to avoid contact of the stiffening member 104 with the labial and/or buccal muscles and to improve the comfort of the shell-like dental implement worn by the patient. The reinforcement member 104 can be disposed in a gingival-jaw direction or a mesial-distal direction. The reinforcing member 104 may be an integral structure or a separate structure from the barrier portion 102. When the reinforcing member 104 is a unitary structure with the barrier portion 102, referring to fig. 10 and 11, the reinforcing member 104 is a cavity structure having a surface curvature exceeding that of the barrier portion 102, and the cavity structure may be convex outward or concave inward, so as to increase the strength of the barrier portion 102 by increasing the surface area of the barrier portion 102, thereby preventing deformation of the barrier portion 102 under the pressure applied by the labial and/or buccal muscles. The vacuole structure can be a plurality of convex or concave dot structures or one or more convex or concave oval structures. In addition, the reinforcing member may be a reinforcing rib adhered to any one or more of the proximal surface, the distal surface, the proximal surface, and the distal surface, and also can increase the rigidity of the blocking portion 102, which is not described herein.

In other embodiments, referring to the shell-shaped dental device shown in fig. 12, the shell-shaped body 100 is further provided with an arch expansion device 105 used together with the blocking part 102, the arch expansion device 105 is integrated with the shell-shaped body 100, and two ends of the arch expansion device 105 are connected with or close to the gingival margin of the lingual side of the left and right posterior tooth areas of the first shell-shaped body 100. Alternatively, the arch expanding device 105 and the shell-shaped body 100 are of a separate structure, and the arch expanding device 105 is detachably mounted on the shell-shaped body 100. The arch-expanding device 105 is generally adapted to be worn on a shell-like dental appliance worn on the upper jaw to stretch the unclosed palatal midline by applying a horizontal force to one or more teeth in the posterior dental area to stimulate new bone deposition within the midline, thereby stimulating jaw growth, increasing arch width and improving arch morphology. The shield eliminates the reverse inhibiting effect of partial lip muscles and/or cheek muscles on corresponding teeth during arch expansion, thereby achieving better arch expansion effect. On the shell-shaped arch expansion instrument without the screen shield, the arch expansion is usually subjected to the reverse inhibition effect of the buccinator on the teeth during arch expansion, so that the arch expansion effect is not obvious and the expected correction effect is not achieved. The shell-shaped dental appliance in the embodiment reduces the pressure applied by the buccinator to the corresponding teeth by arranging the screen structure on the shell-shaped appliance while expanding the arch, so that the arch expanding effect is obvious, and the shell-shaped dental appliance has great significance.

The application also provides a ware suit is rescued to shelly dentistry, including first shelly body and second shelly body, first shelly body is for the shelly dental instrument as in above-mentioned arbitrary one embodiment, the second shelly body is equipped with a plurality of teeth and accomodates the chamber, first shelly body with the cooperation of second shelly body is used. The second shell-like body may also be provided as a shell-like dental instrument as in any of the embodiments described above. The first shell-shaped body and the second shell-shaped body can be provided with screens at the labial side, the buccal side and the labial-buccal side. When the screen arranged on the first shell-shaped body and the screen arranged on the second shell-shaped body are consistent in position on the long axis of the tooth, the lengths of the blocking part on the first shell-shaped body and the blocking part on the second shell-shaped body in the direction of the long axis of the tooth do not exceed the jaw plane. The blocking part that its aim at first shell form body and second shell form body set up on patient's cooperation in-process first shell form body and the blocking part that sets up on the second body do not influence each other, improve the precision of correcting.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A shell-shaped dental instrument comprises a shell-shaped body provided with a plurality of tooth receiving cavities, and is characterized in that the shell-shaped body is provided with a screen, the screen comprises a blocking part which is arranged on the side surface of a lip and/or a cheek and protrudes towards the direction of a far tooth, and a contact part which is connected with the blocking part and is arranged, when the shell-shaped dental instrument is worn, the blocking part is in contact with a labial muscle and/or a cheek muscle, and the force applied by the labial muscle and/or the cheek muscle to the blocking part is at least partially transmitted to a corresponding gum through the contact part.

2. A shell-like dental instrument according to claim 1, wherein the tooth receiving cavity has a geometry that causes at least a partially received tooth to move from a first position to a second position.

3. A shell-like dental instrument according to claim 1, wherein the contact portion has a structure which stably contacts with a corresponding gum when worn.

4. A shell-like dental instrument according to claim 3, wherein the contact portion has a proximal surface shaped to substantially conform to a corresponding gingival.

5. A shell-like dental instrument according to claim 1, wherein the barrier is formed by a labial and/or buccal side of the at least one tooth receiving cavity bulging in the distal direction.

6. A shell-like dental implement according to claim 5, in which the inner surface of the barrier is at least partially out of contact with the outer side of the tooth adjacent the inner surface of the barrier when worn.

7. A shell-like dental instrument according to claim 1, wherein the blocking portion is provided protruding in the distal direction at the gingiva on the labial and/or buccal side of the shell-like body.

8. A shell-like dental instrument according to claim 7, wherein the blocking portion is of unitary or separate construction from the contact portion.

9. A shell-type dental instrument according to claim 8, wherein the blocking portion is a cavity structure protruding in the distal direction when the blocking portion and the contact portion are of a unitary structure.

10. A shell-like dental instrument according to claim 9, wherein the cross-sectional shape of the barrier in the direction of the long axis of the tooth is one of an oval shape, a drop shape, a polygon shape or a combination thereof.

11. A shell-like dental instrument according to claim 10, wherein the interior of the barrier is provided with a filler which enhances the strength of the barrier.

12. A shell-like dental instrument according to claim 8, wherein the stopper is fixed to the shell-like body by any one of adhesion, caulking and welding when the stopper and the contact portion are of a separate structure.

13. A shell-like dental instrument according to claim 8, wherein the stop portion and the contact portion are of a separate construction, the stop portion and the contact portion being of a material which is identical or not identical.

14. A shell-like dental instrument according to claim 13, wherein the material thickness of the barrier is greater than the material thickness of the contact when the barrier is of the same material as the contact.

15. A shell-like dental instrument according to claim 13, wherein the modulus of elasticity of the barrier material is greater than the modulus of elasticity of the contact material when the barrier is not in conformity with the contact material.

16. A shell-like dental instrument according to claim 13, wherein the barrier is a solid projection.

17. A shell-like dental instrument according to claim 1, wherein the maximum height of the stop projecting in the distal direction is between 3mm and 8 mm.

18. A shell-like dental instrument according to claim 1, wherein the length of the barrier in the direction of the dental arch is 1-6 teeth wide.

19. A shell-like dental instrument according to claim 1, wherein the length of the barrier in the direction of the dental arch is the width of the entire dental arch.

20. A shell-like dental instrument according to claim 1, wherein any one or more of the proximal, distal, mesial, or distal surfaces of the barrier is provided with at least one stiffening member.

21. A shell-like dental instrument according to claim 20, wherein the stiffening member is integrally formed with the barrier and is a void structure having a surface curvature that exceeds a surface curvature of the barrier.

22. A shell-like dental instrument according to claim 20, wherein the stiffening member is of a separate construction from the barrier, the stiffening member being fixedly mounted on the barrier.

23. A shell-like dental instrument according to any one of claims 20-22, wherein a stiffening member is provided on the barrier in the gingival-jaw direction or in the mesial-distal direction.

24. A shell-like dental instrument according to claim 1, wherein the shell-like body is further provided with an arch-expanding device for use with the stop.

25. A shell-like dental instrument according to claim 24, wherein the arch expansion device is of unitary construction with the shell-like body, the ends of the arch expansion device being connected to or adjacent the gingival margin of the lingual side of the posterior dental area on each of the left and right sides of the shell-like body.

26. A shell-like dental instrument according to claim 24, wherein the arch-expansion device is of a separate construction from the shell-like body to which it is removably mounted.

27. A shell-shaped dental appliance kit comprising a first shell-shaped body and a second shell-shaped body, wherein the first shell-shaped body is the shell-shaped dental appliance of any one of claims 1 to 26, the second shell-shaped body is provided with a plurality of tooth receiving cavities, and the first shell-shaped body and the second shell-shaped body are used in cooperation.

28. The shell-shaped dental appliance kit of claim 27, wherein the second shell-shaped body is the shell-shaped dental appliance of any one of claims 1-26.

29. The shell-shaped dental appliance kit of claim 28, wherein when the position of the shield on the first shell-shaped body is consistent with the position of the shield on the second shell-shaped body on the long axis of the tooth, the length of the blocking portion on the first shell-shaped body and the length of the blocking portion on the second shell-shaped body in the direction of the long axis of the tooth do not exceed the jaw plane.